Openshift commands

oc comands

1. oc get pods

2.oc describe pod nginx-78f5d695bd-7x4xm

3. oc get all

4. oc get svc

5.oc delete pod mysql-1-deploy -n myproject --grace-period=0 --force

6. Oc Dashboard

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How to copy files from one server to another server by using ansible copy module

We have two servers 1.master 2.worker1 create playbook example: play.yml --- - hosts: all tasks: - name: Ansible copy file to remote server copy: src: ~/kube-cluster dest: /root Run ansible playbook ansible-playbook play.yml

Kubernetes interview questions and answers

1.H ow to setup kubernetes dashboard on ubuntu16.04 cluster? To create kubernetes dashboard follow below link https://docs.aws.amazon.com/eks/latest/userguide/dashboard-tutorial.html To deploy the Metrics Server kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.3.6/components.yaml kubectl get deployment metrics-server -n kube-system Deploy the dashboard kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml root@ip-172-31-43-76:~# kubectl get svc -n kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE dashboard-metrics-scraper ClusterIP 10.102.6.123 <none> 8000/TCP 120m kubernetes-dashboard ...

shell scripting and important linux questions and answers

1.echo $0 what it means? It will show the name of the currently running process Example: prepare test.sh #!/bin/bash echo $0 Then run test.sh after giving permission to chmod 700 test.sh root@ip-172-31-15-196:~# chmod 700 test.sh root@ip-172-31-15-196:~# ./test.sh ./test.sh 2.How to create 100 empty files at a time? touch file-{001..100} 3.What is hardlink and softlink and how it will be work and what is the difference between them? Hard link: 1.If we delete original file our data will be available 2.Inode number of both original file and hard link file both are same 3.Hard links are fast . Soft link: 1.If we delete original file our data will not be available 2.inode of original file and soft link file are different 3.Soft links are slower. 4.soft links can be used for linking directories 5.soft links will work across file systems. 6.File permissions are different. Creating sof link creating a file1.txt [root@ip-172-31-43-210 linux]# echo "ashwika tech" >...

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